Eiichi Ishii

Profile Information

Affiliation: Japan Atomic Energy Agency

Degree: PhD (Sci)(Hokkaido Univ.)

ORCID ID: https://orcid.org/0000-0002-1103-2855
J-GLOBAL ID: 201201029232455600
researchmap Member ID: B000220106

Research Interests

Radioactive waste disposal

Research Areas

Natural sciences / Solid earth science / Geology

Research History

Apr, 2002 - Present

Japan Atomic Energy Agency (ex-JNC)

Education

- Mar, 2009

Department of Natural History Sciences (PhD), Graduate School of Science, Hokkaido Univ.
- Mar, 2002

Department of Earth and Planetary Sciences (MS), Graduate School of Science, Hokkaido Univ.
- Mar, 2000

Department of Earth and Planetary Material Sciences, Faculty of Science, Hokkaido Univ.

Awards

Oct, 2022

JAEA President Award, Japan Atomic Energy Agency

Eiichi Ishii
Oct, 2018

JAEA President Award, Japan Atomic Energy Agency

Eiichi Ishii
Aug, 2017

Outstanding contribution in reviewing, Engineering Geology (Elsevier)

Eiichi Ishii
Feb, 2017

Outstanding contribution in reviewing, Journal of Structural Geology (Elsevier)

Eiichi Ishii
Sep, 2009

Young Scientist Award, The Geological Society of Japan

Eiichi Ishii

Papers

Evaluation of temporal changes in fracture transmissivity in an excavation damaged zone after backfilling a gallery excavated in mudstone

Aoyagi Kazuhei, Ishii Eiichi

Environmental Earth Sciences, 83(3) 98\_1-98\_15, Feb, 2024 Peer-reviewed
Paleohydrogeology of the Horonobe area, Northern Hokkaido, Japan: Groundwater flow conditions during glacial and postglacial periods estimated from chemical and isotopic data for fracture and pore water

Akihito Mochizuki, Eiichi Ishii

APPLIED GEOCHEMISTRY, 155 105737\_1-105737\_15, Aug, 2023 Peer-reviewed
Effects of flow dimension in faulted or fractured rock on natural reductions of inflow during excavation; A Case study of the Horonobe Underground Research Laboratory site, Japan

Eiichi Ishii

Hydrogeology Journal, 31(4) 893-911, Jun, 2023 Peer-reviewed
地下深部の岩盤における地下水の流れの有無を水の安定同位体比から判別する

望月陽人, 石井英一

Isotope News, 784 23-27, Dec, 2022 Invited
Constant-head step injection tests to quantify the stress dependence of fracture transmissivity in an excavation damaged zone: A case study from the Horonobe Underground Research Laboratory

Eiichi Ishii

International Journal of Rock Mechanics and Mining Sciences, 159 105229-105229, Nov, 2022 Peer-reviewed
Assessment of the level of activity of advective transport through fractures and faults in marine deposits by comparison between stable isotope compositions of fracture and pore waters

Akihito Mochizuki, Eiichi Ishii

Hydrogeology Journal, 30(3) 813-827, May, 2022 Peer-reviewed
Resin-Injection Testing and Measurement of the Shear Displacement and Aperture of Excavation-Damaged-Zone Fractures: A Case Study of Mudstone at the Horonobe Underground Research Laboratory, Japan

Kazuhei Aoyagi, Eiichi Ishii, Youqing Chen, Tsuyoshi Ishida

Rock Mechanics and Rock Engineering, 55 1855-1869, Mar 24, 2022 Peer-reviewed
Study in the sedimentary processes of organic matter in the Pliocene to Miocene siliceous rocks in the Horonobe district, northern Hokkaido, Japan

Ami Muraoka, Shun Chiyonobu, Hiroyuki Arato, Paolo Martizzi, Eiichi Ishii

Journal of the Japanese Association for Petroleum Technology, 87 86-88, Jan, 2022 Peer-reviewedInvited
Effect of fault activation on the hydraulic connectivity of faults in mudstone

Hirokazu Ohno, Eiichi Ishii

Geomechanics for Energy and the Environment, 31 100317-100317, Jan, 2022 Peer-reviewed
Variation in fault hydraulic connectivity with depth in mudstone: An analysis of poroelastic hydraulic response to excavation in the Horonobe URL

Yusuke Ozaki, Eiichi Ishii, Kentaro Sugawara

Geomechanics for Energy and the Environment, 31 100311-100311, Jan, 2022 Peer-reviewed
The highest potential transmissivities of fractures in fault zones: Reference values based on laboratory and in situ hydro-mechanical experimental data

Eiichi Ishii

Engineering Geology, 294 106369-106369, Dec, 2021 Peer-reviewed
A conventional straddle-sliding-packer system as a borehole extensometer: Monitoring shear displacement of a fault during an injection test

Eiichi Ishii

Engineering Geology, 275 105748-105748, Sep, 2020 Peer-reviewed
Mudstone redox conditions at the Horonobe Underground Research Laboratory, Hokkaido, Japan: Effects of drift excavation

Akihito Mochizuki, Eiichi Ishii, Kazuya Miyakawa, Hiroshi Sasamoto

Engineering Geology, 267 105496, 2020 Peer-reviewed
Visualization of fractures induced around the gallery wall in Horonobe Underground Research Laboratory

Aoyagi Kazuhei, Chen Y.*, Ishii Eiichi, Sakurai Akitaka, Ishida Tsuyoshi*

Proceedings of 5th ISRM Young Scholars' Symposium on Rock Mechanics and International Symposium on Rock Engineering for Innovative Future (YSRM 2019 and REIF 2019) (USB Flash Drive), 6, Dec, 2019 Peer-reviewed
Protolith identification of bedding-parallel, smectite-bearing shear zones in argillaceous and siliceous marine sediments: Discriminating between tephra-derived shear zones and host-rock-derived fault gouges

Eiichi Ishii

Engineering Geology, 259 105203, Sep, 2019 Peer-reviewed
A method for estimating the highest potential hydraulic conductivity in the excavation damaged zone in mudstone

Kazuhei Aoyagi, Eiichi Ishii

Rock Mechanics and Rock Engineering, 52 385-401, Feb, 2019 Peer-reviewed
Evolution of the excavation damaged zone around a modelled disposal pit; Case study at the Horonobe Underground Research Laboratory, Japan

Aoyagi Kazuhei, Miyara Nobukatsu, Ishii Eiichi, Nakayama Masashi, Kimura Shun

Proceedings of 13th SEGJ International Symposium (USB Flash Drive), 5, Nov, 2018 Peer-reviewed
Evaluating test conditions for in situ tracer migration test in fractured siliceous involving groundwater with dissolved gas

Masaki Takeda, Eiichi Ishii, Hirokazu Ohno, Satoshi Kawate

Journal of Nuclear Fuel Cycle and Environment, 25 3-14, Jun, 2018 Peer-reviewed
Assessment of hydraulic connectivity of fractures in mudstones by single-borehole investigations

Eiichi Ishii

Water Resources Research, 54 3335-3356, Jun, 2018 Peer-reviewed
Temporal trend in excavation disturbed zone around a modeled disposal pit in Horonobe Underground Research Laboratory

Aoyagi, Kazuhei, Miyara, Nobukatsu, Ishii, Eiichi, Matsuzaki, Yoshiteru

Shigen, Sozai Koenshu (Internet), 5(1) 7, Mar, 2018

Misc.

Long-term monitoring of pore pressure/groundwater level using deep/shallow boreholes in the Horonobe Underground Research Laboratory Project

Honda Norihisa, Dei Shuntaro, Ishii Eiichi

JAEA-Data/Code 2022-002, 37, Jun, 2022
Update on the regional-scale 3D geological model in the Horonobe Underground Research Laboratory Project

Sakai Toshihiro, Ishii Eiichi

JAEA-Data/Code 2021-009, 13, Aug, 2021
Assessment of the level of activity of advective transport through fractures in Neogene mudstone by comparison between stable isotope compositions of fracture and pore waters

望月陽人, 石井英一

日本地質学会学術大会(Web), 128th, 2021
Does fault activation affect the hydraulic disconnectivity of faults in mudstone?

Ono Hirokazu, Takeda Masaki, Ishii Eiichi

Extended abstract of International Conference on Coupled Processes in Fractured Geological Media; Observation, Modeling, and Application (CouFrac 2020) (Internet), 4, Nov, 2020
Poroelastic hydraulic-response of fractured mudstone to excavation in the Horonobe URL; As an indicator of fracture hydraulic-disconnectivity

Ozaki Yusuke, Ishii Eiichi, Sugawara Kentaro*

Extended abstract of International Conference on Coupled Processes in Fractured Geological Media; Observation, Modeling, and Application (CouFrac 2020) (Internet), 4, Nov, 2020
Poro-elastic parameter acquisition test using siliceous mudstone (Wakkanai formation)

Aoki Tomoyuki*, Tani Takuya*, Sakai Kazuo*, Koga Yoshihisa*, Aoyagi Kazuhei, Ishii Eiichi

JAEA-Research 2020-002, 83, Jun, 2020
Hydraulic tests for the excavation damaged zone around the 350m niches in the Horonobe Underground Research Project, 2

Samata Yoichi, Ishii Eiichi

JAEA-Data/Code 2019-020, 69, Mar, 2020
Visualization of fractures in an excavation damaged zone in the Horonobe Underground Research Laboratory, 2 (Joint research)

Aoyagi Kazuhei, Chen Y.*, Ishii Eiichi, Sakurai Akitaka, Miyara Nobukatsu, Ishida Tsuyoshi*

JAEA-Research 2019-011, 50, Mar, 2020
Synthesis report on the R&D for the Horonobe Underground Research Laboratory Project carried out during fiscal years 2015-2019

Masashi Nakayama, Atsushi Saiga, Shun Kimura, Akihito Mochizuki, Kazuhei Aoyagi, Hirokazu Ohno, Kazuya Miyakawa, Masaki Takeda, Akira Hayano, Toshiyuki Matsuoka …

JAEA-Research, 2019-013, Mar, 2020
Hydraulic tests using borehole PB-V01 in the Horonobe Underground Research Project

Samata Yoichi, Iwata Tatsuya*, Ishii Eiichi

JAEA-Data/Code 2019-008, 19, Sep, 2019
Hydraulic tests for the excavation damaged zone around the 350m niches in the Horonobe Underground Research Project

Yoshino Hiromitsu*, Samata Yoichi, Niunoya Sumio*, Ishii Eiichi

JAEA-Data/Code 2018-015, 169, Feb, 2019
Discrete fracture network model for faults distributed in Neogene massive siliceous mudstones

Hayano Akira, Ishii Eiichi

Shigen, Sozai Koenshu (Internet), 5(1) 9, Mar, 2018
Visualization of fractures in an Excavation Damaged Zone in the Horonobe Underground Research Laboratory (Joint research)

Aoyagi Kazuhei, Chen Y.*, Sakurai Akitaka, Ishii Eiichi, Ishida Tsuyoshi*

JAEA-Research 2017-014, 49, Jan, 2018
幌延深地層研究計画における坑道掘削(地下施設建設)時の調査研究段階(第2段階:深度350mまで)研究成果報告書

佐藤稔紀, 笹本広, 石井英一, 松岡稔幸, 早野明, 宮川和也, 藤田朝雄, 棚井憲治, 中山雅, 武田匡樹 …

JAEA-research, 2016(25) 巻頭1-2,1-313, Mar, 2017
Horonobe Underground Research Laboratory Project Synthesis of Phase II (Construction Phase) Investigations to a Depth of 350m

Toshinori Sato, Hiroshi Sasamoto, Eiichi Ishii, Toshiyuki Matsuoka, Akira Hayano, Kazuya Miyakawa, Tomoo Fujita, Kenji Tanai, Masashi Nakayama, Masaki Takeda …

JAEA-Research, 2016-025, Mar, 2017 Peer-reviewed
Data of fractures based on the deep borehole investigations in the Horonobe Underground Research Laboratory Project (Phase 1)

Kusano Tomohiro, Ishii Eiichi

JAEA-Data/Code 2015-024, 6, Feb, 2016
A Study on the Strength Properties of the Rock Mass Based on Triaxial Tests Conducted at the Horonobe Underground Research Laboratory

JAEA-research, 2015(1) 巻頭1-2,1-46, Mar, 2015
P1. Predictions of transmissivity of fault zones from strength-stress conditions of rocks

Ishii Eiichi, Matsuoka Toshiyuki, Saegusa Hiromitsu, Takeuchi Ryuji

27 135-136, 2015
Horonobe Underground Research Laboratory Project; Synthesis of phase I investigation 2001 - 2005, Volume "Geological disposal research"

Fujita Tomoo, Taniguchi Naoki, Matsui Hiroya, Tanai Kenji, Maekawa Keisuke, Sawada Atsushi, Makino Hitoshi, Sasamoto Hiroshi, Yoshikawa Hideki, Shibata Masahiro …

JAEA-Research 2011-001, 193, Mar, 2011
Collection of URL measurement data in 2009 fiscal year at the Horonobe Underground Research Laboratory Project

Inagaki Daisuke, Ishii Eiichi, Niinuma Hiroaki, Sanada Hiroyuki, Tsusaka Kimikazu, Sano Michiaki*, Sawada Sumiyuki

JAEA-Data/Code 2010-027, 151, Feb, 2011

Books and Other Publications

日本地方地質誌 1 北海道地方

広瀬亘, 中川光弘, 石井英一, 曽我智彦, 藤原伸也, 池田保夫, 和田恵治, 石崎泰男, 石塚吉浩 (Role: Joint author, 火山 8.3 北海道中央部)

朝倉書店, 2010

Presentations

Analysis of minor shear planes in Neogene sedimentary rocks

Tamura Tomonori, Ishii Eiichi

日本地質学会第130年学術大会
Geochemical modelling of cation-exchange reaction and whole-rock compositional change in Neogene marine sediments

Abe Takeyasu, Iida Yoshihisa, Sasamoto Hiroshi, Ishii Eiichi

日本地球惑星科学連合2023年大会(JpGU Meeting 2023)
Prediction of natural reduction of inflow at the underground research facility based on the flow dimensions of inflow along fractures in the rock mass

Sakuma Keisuke, Ishii Eiichi, Murakami Hiroaki, Honda Norihisa

日本地球惑星科学連合2023年大会(JpGU Meeting 2023)
Estimation of groundwater inflow into single borehole using the value of flow dimension; A Case study at Horonobe Underground Research Laboratory

Murakami Hiroaki, Ishii Eiichi

日本地球惑星科学連合2023年大会(JpGU Meeting 2023)
Numerical modelling of ion exchange reactions in sedimentary rocks and its application to natural systems

Abe Takeyasu, Ishii Eiichi

日本鉱物科学会2022年年会
Assessment of the level of activity of advective transport through fractures in Neogene mudstone by comparison between stable isotope compositions of fracture and pore waters

Mochizuki Akihito, Ishii Eiichi

日本地質学会第128年学術大会(2021名古屋大会)
Study in the sedimentary processes of organic matter in the Pliocene to Miocene siliceousrocks in the Horonobe district, northern Hokkaido, Japan

Muraoka Ami*, Arato Hiroyuki*, Chiyonobu Shun*, Ishii Eiichi

令和3年度石油技術協会春季講演会
Examination of organic matter preservation process in siliceous rocks distributed in northern Hokkaido

Muraoka Ami*, Arato Hiroyuki*, Chiyonobu Shun*, Ishii Eiichi

令和2年度石油技術協会学術大会
Verification of the highest potential transmissivity of a fault-zone fracture by injection tests using a conventional packer system and analysis of hydromechanical responses

Ishii Eiichi

日本地質学会第126年学術大会(2019山口)
Evaluating the mass transport characteristics for fault zone in mudstone at the Horonobe Underground Research Laboratory

Takeda Masaki, Ishii Eiichi, Ono Hirokazu, Tachi Yukio, Ito Tsuyoshi*, Nemoto Kazuaki*

17th International Conference on the Chemistry and Migration Behavior of Actinides and Fission Products in the Geosphere (Migration 2019)
Comprehensive study of the migration property in representative rock of Japan at underground research laboratories

Iwatsuki Teruki, Ishii Eiichi

17th International Conference on the Chemistry and Migration Behavior of Actinides and Fission Products in the Geosphere (Migration 2019)
In-situ tracer migration test in the deeper part of the Wakkanai Formation at the Horonobe Underground Research Laboratory

Ono Hirokazu, Takeda Masaki, Ishii Eiichi

日本原子力学会バックエンド部会第35回バックエンド夏期セミナー
Modeling of solutes transport at the Horonobe URL; In-situ tracer tests for fractures in fault zone

Takeda Masaki, Ono Hirokazu, Ishii Eiichi, Tachi Yukio, Nemoto Kazuaki*

日本原子力学会2018年秋の大会
Assessment of hydraulic connectivity of fractures in mudstones by single-borehole investigations

Ishii Eiichi

日本地球惑星科学連合2018年大会(JpGU 2018)
Modeling of solutes transport at the Horonobe URL, 2; Characterization of solutes transport in fractures based on data from in-situ tracer tests

Ono Hirokazu, Takeda Masaki, Ishii Eiichi, Tachi Yukio

日本原子力学会2017年秋の大会
Modeling of solutes transport at the Horonobe URL, 1; In-situ tracer tests for fractures and rock matrices in mudstone

Takeda Masaki, Ono Hirokazu, Ishii Eiichi, Tachi Yukio

日本原子力学会2017年秋の大会
The Role of low-temperature organic matter diagenesis in carbonate precipitation within a marine deposit

Miyakawa Kazuya, Ishii Eiichi

2017年度日本地球化学会第64回年会
The Redox condition of rocks in the excavation damaged zone of galleries in the Horonobe Underground Research Laboratory

Mochizuki Akihito, Miyakawa Kazuya, Ishii Eiichi, Sasamoto Hiroshi, Sato Toshinori

2017年度日本地球化学会第64回年会
Influence of the failure modes of damage-zone fractures in fault zones on equivalent permeability of rock masses

Ishii Eiichi

日本地質学会第124年学術大会(2017愛媛)
In situ diffusion experiment for siliceous mudstone at the Horonobe URL

Ono Hirokazu, Takeda Masaki, Ishii Eiichi, Kawate Satoshi

日本原子力学会2017年春の年会

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